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CNRS 
Study of benchmarking Molecules by the NICE-OHMS technique in the InfraRed, Application to Metrology and Trace Detection.
Université du Littoral, Cotre d'Opale, Dunkerque
Laboratoire de Physico-Chimie de l'Atmosphrere
Optical Physics Applied Physics Metrology 
Full Description:

We are starting to develop a new activity around the detection of barely absorbing species in gaseous phase.
Weak absorption are due to, either weak absorption cross-sections, or to the low number density of the species. Under these conditions, we have chosen to implement the NICE-OHMS (Noise-Immune Cavity-Enhanced Optical Heterodyne Molecular Spectrometry) technique. This technique combines a very high-finesse cavity, and a heterodyne detection to optimize the signal-to-noise ratio. It in an ultimate technique, because the quantum limit of detection (shot noise) can be approached.

While the NICE-OHMS technique has been developed in a limited number of specific spectral ranges till now, we decided to extended it to strategic spectral ranges. i.e. the InfraRed (IR). In a first step,
the experimental setup will be implemented in the Near-IR range,
then it will be gently extended to the Mid-IR range. The PhD student will have to build up, the optical cavity (from moderate to high finesse), the servo loops, for demonstrating the setup performances in the range 1.34–1.45 mm. Benchmarking molecules will be studies to show the potential of the setup. Line-shapes under saturated absorption conditions will be investigated under the specific environment of the NICE-OHMS technique.
Furthermore, the Mid-IR range will be investigated according to the availability of research grants. HD and 14CO2 species will be eventually targeted.
International collaborations on specific topics are anticipated.

The Candidate:

We are looking for enthusiastic candidate with an experimental skill.

Previous publication about the project:
P. Dupré, J.Opt. Soc. Am. B, 32, 838 (2015).

Please send your application letter with motivation, CV, and names of two persons willing to provide letters of reference.

 


PhD Research Position

Subject: Study of benchmarking Molecules by the NICE-OHMS technique in the InfraRed, Application to Metrology and Trace Detection.

Supervisor: Patrick Dupré

Location: Université du Littoral, Côte d'Opale (LPCA), Dunkerque, France

Duration: 3 years (starting Oct. 2016)

Anticipated Salary:~1700 €/month (gross)

Contact: pdupre@gmx.com

Backgrounds: Molecular Spectroscopy, Optics, Instrumentation, Engineering

We are starting to develop a new activity around the detection of barely absorbing species in gaseous phase. Weak absorption are due to, either weak absorption cross-sections, or to the low number density of the species. Under these conditions, we have chosen to implement the NICE-OHMS (Noise-Immune Cavity-Enhanced Optical Heterodyne Molecular Spectrometry) technique. This technique combines a very high-finesse cavity, and a heterodyne detection to optimize the signal-to-noise ratio. It in an ultimatetechnique, because the quantum limit of detection (shot noise) can be approached.

While the NICE-OHMS technique has been developed in a limited number of specific spectral ranges till now, we decided to extended it to strategic spectral ranges. i.e. the InfraRed (IR). In a first step, the experimental setup will be implemented in the Near-IR range, then it will be gently extended to the Mid-IR range.

The PhD student will have to build up, the optical cavity (from moderate to high finesse), the servo loops, fordemonstrating the setup performances in the range 1.34–1.45 mm. Benchmarking molecules will be studies to show the potential of the setup. Line-shapes under saturated absorption conditions will be investigated under the specific environment of the NICE-OHMS technique.Furthermore, the Mid-IR range will be investigated according to the availability of research grants. HD and 14CO2species will beeventually targeted.

International collaborations on specific topics are anticipated.

The Candidate: We are looking for enthusiastic candidate with an experimental skill.

Previous publication about the project: P. Dupré, J. Opt. Soc. Am. B, 32, 838 (2015).

Please send your application letter with motivation, CV, and names of two persons willing to provide letters of reference.



Posted on: 19 February 2016Deadline to apply: 15 September 2016Start Date: 01 October 2016 Duration: 36 months
The Fund category is Mixed Funding and the salary is 20-25k€ annual gross
Doctoral School is Matter, radiation and environmental sciences in the Nord-Pas-de-Calais Region.

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